import java.util.Scanner;

public class Access02 {
    public static void main(String[] args) {
        int pencil=1;  //铅笔价格
        int rubber=2;  //橡皮价格
        int cola=3;    //可乐价格
        int book=12;   //书本价格
        int snacks=5;  //零食价格
        System.out.println("书本的价格为"+book+"元，您总共有20元");
        System.out.println("1.铅笔的价格为："+pencil+"元");
        System.out.println("2.橡皮的价格为："+rubber+"元");
        System.out.println("3.可乐的价格为："+cola+"元");
        System.out.println("4.零食的价格为："+snacks+"元");
        Scanner scl = new Scanner(System.in);
        System.out.println("请输入其他需要购买商品的序列号：");
        int id=scl.nextInt();
        switch (id){
            case 1:
                int pencilmoney=20-book;
                int pencilsum=pencilmoney/pencil;
                int pencilsurplus=pencilmoney%pencil;
				  System.out.println("购买完书本后还可以购买铅笔"+pencilsum+"个，" +
                          "还剩"+pencilsurplus+"元");
                  break;
            case 2:
				  int rubbermoney=20-book;
				  int rubbersum=rubbermoney/rubber;
				  int rubbersurplus=rubbermoney%rubber;
				  System.out.println("购买完书本后还可以购买橡皮"+rubbersum+"" +
                          "个，还剩"+rubbersurplus+"元");
                break;
            case 3:
				  int colamoney=20-book;
				  int colasum=colamoney/cola;
				  int colasurplus=colamoney%cola;
				 System.out.println("购买完书本后还可以购买可乐"+colasum+"" +
                         "个，还剩"+colasurplus+"元");
                break;
            case 4:
				  int snacksmoney=20-book;
				  int snackssum=snacksmoney/snacks;
				  int snackssurplus=snacksmoney%snacks;
				  System.out.println("购买完书本后还可以购买零食"+snackssum+"" +
                          "个，还剩"+snackssurplus+"元");
                break;
			  default:
				  System.out.println("您的输入有误。");
				  break;
        }
    }
}
